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Research on attachment transmission has focused on variable-centered analyses, where hypotheses are tested by examining linear associations between variables. The purpose of this study was to apply a relationship-centered approach to data analysis, where adult states of mind, maternal sensitivity, and infant attachment were conceived as being three components of a single, intergenerational relationship. These variables were assessed in 90 adolescent and 99 adult mother–infant dyads when infants were 12 months old. Initial variable-centered analyses replicated the frequently observed associations between these three core attachment variables. Relationship-based, latent class analyses then revealed that the most common pattern among young mother dyads featured maternal unresolved trauma, insensitive interactive behavior, and disorganized infant attachment (61%), whereas the most prevalent adult mother dyad relationship pattern involved maternal autonomy, sensitive maternal behavior, and secure infant attachment (59%). Three less prevalent relationship patterns were also observed. Moderation analyses revealed that the adolescent–adult mother distinction differentiated between secure and disorganized intergenerational relationship patterns, whereas experience of traumatic events distinguished between disorganized and avoidant patterns. Finally, socioeconomic status distinguished between avoidant and secure patterns. Results emphasize the value of a relationship-based approach, adding an angle of understanding to the study of attachment transmission.

In this paper, we examine the dopant distributions in 1.8 to 4 micron-thick boron- and phosphorus-doped epitaxial silicon layers. These layers were grown by chemical vapor deposition (CVD) on arsenic-, antimony-, or boron-doped (100)- and (111)-oriented substrates. We performed doping profile studies by means of local resistivity measurements using a spreading resistance probe (SRP). Chemical profiles of the dopants were also obtained using secondary ion mass spectrometry (SIMS).

The interrelations of maternal attachment representations,
mother–infant interaction in the home, and attachment relationships
were studied in 99 adolescent mothers and their 12-month-old infants. A
q-factor analysis was used to identify emergent profiles of mother and
infant interaction. Traditional multivariate statistical analyses were
complemented by a relationship-based approach utilizing latent class
analysis. The results confirmed many theoretical predictions linking
interaction with autonomous maternal representations and secure
attachment, but failed to support a mediating role for maternal
sensitivity. Strong associations were found between mothers displaying
nonsensitive and disengaged interaction profiles, infants who did not
interact harmoniously with the mother and preferred interaction with the
visitor, unresolved maternal representations, and disorganized attachment
relationships. Moreover, maternal nonsensitive and disengaged interaction
in the home mediated the association between unresolved representations
and disorganization. The results of the latent class analysis were
consistent with these findings and revealed additional, empirically
derived associations between attachment classifications and patterns of
interactive behavior, some of which prompt a reconsideration of our
current understanding of attachment transmission in at-risk
populations.This research was supported by
a predoctoral fellowship to the first author from the Social Sciences and
Humanities Research Council and by research grants to the second and third
authors from the Social Sciences and Humanities Research Council, the
Ontario Mental Health Foundation, and Health Canada.